rectosigmoid junction

Also found in: Acronyms.

rec·to·sig·moid junc·tion

the site at which the sigmoid colon becomes the rectum; usually takes the form of an acute angle, demarcated externally by a discontinuation of appendices epiploicae, a spreading out of the teniae coli to completely encircle the rectum, and consequently, termination of the sacculations (haustrae) between the teniae.
References in periodicals archive ?
He underwent surgery because oral and intravenous contrast-enhanced abdominal tomographs revealed perforation proximal to the rectosigmoid junction, associated with extensive intra-abdominal free fluid and free air (Fig.
Colonoscopic examination showed an unusual polypoid tumor with stenosis of the lumen at the rectosigmoid junction, but endoscopic biopsy showed only nonspecific inflammation.
2] Here we present an interesting case of primary colorectal lymphoma involving the rectosigmoid junction, rectum and anal canal.